42320321 has 8 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 41875120.

The previous prime is 42320297. The next prime is 42320329. The reversal of 42320321 is 12302324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42320321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42320321.

It is not an unprimeable number, because it can be changed into a prime (42320329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63890 + ... + 64548.

It is an arithmetic number, because the mean of its divisors is an integer number (5346000).

Almost surely, 2^42320321 is an apocalyptic number.

It is an amenable number.

42320321 is a deficient number, since it is larger than the sum of its proper divisors (447679).

42320321 is a wasteful number, since it uses less digits than its factorization.

42320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 42320321 is about 6505.4070587474. The cubic root of 42320321 is about 348.4841134030.

Adding to 42320321 its reverse (12302324), we get a palindrome (54622645).

The spelling of 42320321 in words is "forty-two million, three hundred twenty thousand, three hundred twenty-one".